Extruding machine



v.` n RoYLE '2,037,823

EXTRULNG MACHINE Filed Feb. 18, 1952 April 21, 1936.

3 Sheets-Sheet 1 2l, V' ROYLE EXTRUDING MACHINE 3 Sheets-Sheet 2 FiledFeb. 1s, 1932 INVENToR 'y BY ATroRNn-:Ys

Patented Apr. 21, 1936 Ex'raUnmG MACHINE Vernon Boyle, Paterson, N. J.Application February 1s, 1932, serial No. 593,698

9 Claims.

'Ihis invention relates to an improvement in heads for extrudingmachines.

It has for an object to provide a device of this character which is soconstructed that the parts forming the head may be separatedtransversely without disassembling the parts as a unit, for purposes ofcleaning or replacing parts of the same, and quickly and easilyreturning' them to operative position.

Another object consists in providing a device of this character in whichthe head is formed of two members hinged together so that one member maybe swung outwardly away from the fixed member, thereby exposing theinterior of the head.

Another object consists in providing a device of this character having arelatively thin strainer plate disposed in position on the movablemember and reinforced by the member to resist any undue strain orirregularity in operation.

Another object consists in providing a device of this character havingmeans rotatably mounted on the movable member for cutting the materialtransversely, when so desired, after it named and other objects mayeiectively be at-` tained. k

Machines of this character are so designed t operate on rubbercompounds, including various substances, during the process ofreclaiming the rubber; and these compounds and substances vary greatlyin character and consistency. Consequently, it has been found thatstrainer heads heretofore in use have to be repeatedly taken away to becleaned and again assembled before the machine can again be set inoperation, which disassemblage and assemblage consumes a connsiderableamount of time and labor in handling the parts. My invention isdesigned to overcome these disadvantages and thereby enhance thecapacity of the output of the machine, as well as embody advantagesinherent in the construction.

A practical embodiment of my invention is represented in theaccompanying drawings, in which Fig. 1 represents a plan view of thestrainer head secured to the cylinder, the latter being broken away, andcertain movable elements of the head being shown in diiferent positionsin dotted outline. 'f

Fig. 2 represents a front elevation of the same.

Fig. 3 represents a vertical section taken in the,

plane of the line III- III of Fig. 2,1ooking in the (Cl. 14S-174)direction of the arrows, certain of the elements being shown in anotherposition in dotted outline. Fig'. 4 represents a front' elevation of thestrainer head, showing modif-led form of means for transversely cuttingthe material passed from the head and mechanism for actuating the same,and Fig, represents a horizontal section taken in the plane of the lineV--V of Fig. 4, looking in the direction of the arrows.

The cylinder of the extruding machine may be of any weil-known orapproved form of which the front portion only is shown and representedin the drawings by I. The usual screw or plodder 2 is housed within theliner 3 of the cylinder, and

projects therefrom for co-operation with the fixed member 4 of thestrainer head. This member 4 is secured in position on the cylinder bymeans of a series of stud bolts 5 which extend outwardly from thecylinder I and register with holes formed in the face plate 6 of themember 4. Nuts I are provided for threading on the bolts 5 in order tosecure the face plate and hence the member l in position on thecylinder. The member 4 includes an inner liner 8 which is shouldered at9 to match a reduced flange I0 that projects forwardly from the boreliner 3. A suitable washer Il may be placed between the cylinder I andthe bore liner 3 on one hand, and the face plate 6 andthe inner liner 8on the other hand.

Suitable vpassages I2 are disposed in the member d for the circulationof a temperature controlling mediumin-'aymanner well understood in thisart. `r'.llh'e interior of the member 4 immediately in advance ofthescrew receiving portion expands ory ares abruptztq f the shoulder I3,and, vin order to control the temperature at this point, I embed a tubeI4 byrouting or otherwise cutting out the surfaceof the shoulder I3 Aandthen cover over the tube with metal Aor other suitable materialappropriatelysecuredfin place. The ends I5, I6 of the tube I4, shownl in.dottedlines in Figs. 2 and 3, are arranged to extend Vdownwardly towardthe outer circumference ofthe .member and are provided with couplingsI.'I,'&I8,'k respectively, for connecting the temperature vci)ntrollingmedium, such, for instance, as'steam or'fwater.

` The movable member; oftlie:`--head is denoted by I9 and has its innercircumference 20 for a short distance substantially equal to the innerdiameter of the shoulder I3, then it is ared forwardly and outwardly at2|, though its are is not as abrupt asthat of the interior of the ilxedmember 4 between the end of the'screw and the shoulder I3. The movablemember I9 has also formed in the inner circumference 29, 2I verticalpartitions 22, 23 and connecting horizontal partitions 24, 25 whichserve to divide the material passing therethrough into four sections.Each partition is tapered inwardly at 26 thence outwardly at 21 to allowthe plastic material to flow freely therethrough.

The inner surface of the movable member I9 is recessed at 28 for thereception of a relatively thin foraminous plate 29, the perforations inwhich are denoted by 39. This plate 29 is secured in position in therecess 28 by screws 3l and arranged to abut the vertical and horizontalpartitions which prevent the plate from buckling or becoming distortedby the action of the material being forced away from the screw orplodder.

A screen or strainer 32 is interposed between the shoulder I3 and theplate 29 when the members 4 and I9 are assembled.

The movable member I9 is removably secured to the fixed member by meansof a series of bolts 33, each of which is provided with a head 34mounted to swing on a pivot 35 carried by ears 36, 31 radially disposedon the periphery of the face plate 6, and the threaded outer end of eachbolt is arranged to move into and out of a pair of lugs 38, 39extending' outwardly from the movable member I9. A washer 40 and a nut4I are disposed on the bolt, with the washer in position to engage thelugs 38, 39, so that, as the nut is screwed on its bolt, the member I9by means of its lugs will be drawn toward the member 4 until the plate29 causes the screen 32 to be seated and tightly held upon the shoulderI3.

The member I9 is adapted to be swung into and out of engagement with themember 4, when the bolts are released from the lugs 38, 39, by means ofa hinge formed by knuckles 42, 43 on the movable member I9 looselymounted on pins 44, 45 which are fixed in projections 46, 41 extendinglaterally from the side of the fixed member 4,

In order that the material extruded may be cut transversely at the pointof delivery, I provide a cutter 48 in the form of a wire stretcheddiametrically across the end of the member I9, the outer ends of whichwire are secured to studs 49, 50 carried by the half-sections 5I, 52which are secured together at 53, 54 by means of bolts 55 and nuts 56 toform an annular ring. This ring is arranged to rotate in an annulargroove 51 formed adjacent the outer end of the member I9.

In Figs. 1 to 3 inclusive, this ring is provided with a series ofoutwardly extending sockets 58 which are adapted to receive a pinch baror other suitable means (not shown) for manually moving the ring in itsgroove and the cut-off wire 48 across the outlet of the movable member.

In Figs. 4 and 5 there is shown a modified form of severing means whichcomprises a cut-off Wire 59 having its ends fixed to studs 60, 6Icarried by a ring gear 62 arranged to rotate in an annular recess 63 onthe movable member 64 of the head. This ring gear 62 is retained in therecess 63 by means of an annular ring 65 secured to the end of themember 64 by screws 66. The ring gear 62 is arranged to meshwith apinion 61 mounted on one end of a shaft 68 journaled in the bearing 69on the member 64. 'I'he other end of the shaft 68 is provided with aspiral gear 10 which coacts with the spiral gear 1I mounted to rotate ona hinged pin 'I2 fixed in the knuckle 13 on the hinge.

' Arms 14, 15 extend from the knuckle 13 in position to form the journalfor a drive shaft 16 having keyed thereon a spiral gear 11 which mesheswith the spiral gear 1I In operation: The material to be strained, such,for instance, as ground up or masticated old rubber products, and thelike. is urgedforwardly by the screw 2, passed into the flared chamberin the fixed member'4 of the head immediately in front of the screw,then through the screen 32 and holes 30 in the plate 29 and then throughthe flared outlets adjacent thereto in the movable member I9, where itis divided longitudinally into four sections by the vertical andhorizontal partitions. 'Ihe passage of the material from the screw intothe adjacent chamber is more rapid than its movement from the plate 29into the divided outlet because of the obstruction provided by the saidplate. Theprovision of the abruptly flared chamber between the screw andscreen, and the less abruptly flared outlets conform the device to thiscondition. Additionally, the fact that the screen is'of much greatercross sectional area than the screw receiving portion lends to theincrease in output of the device by permitting the screw to work out ornear its capacity instead of hampering it by back pressure upon thematerial. After a certain amount of material has been strained, it maybe found desirous to clean or remove the screen or plate and, in orderto bring the screen to a position to be operated upon, the nuts 4I andwashers 40 on the bolts 33 are backed off away from the lugs 38, 39 onthe movable member I9, so that the bolts 33 may be swung outwardly ontheir pivots 35 from between the lugs, whereupon the movable member I9may be swung outwardly on its hinges away from the fixed member 4, asshown in dotted outline in Fig. 1.

When the member I9 has been moved away from the fixed member, the fullsurfaces of the screen 32 and plate 29 are exposed so that any cleaningor removal which may be required is readily and easily accomplished.After the screen or plate has been cleaned or renewed and returned toits former position, the member I9 is again swung on its hinges intoengagement with the fixed member, and the bolts 33 replaced between thelugs 38, 39, so that the nuts and washers may be screwed into contactwith the lugs until the member I9 is rigidly secured to the member 4,whereupon the machine is again placed in condition for furtheroperation.

When it is desired to cut the material passing from the outlets in themovable member I9 into predetermined lengths, the operative causes thewire cutter to be moved in a plane transversely to the movement of thematerial. In Figs. l to 3 inclusive, the wire cutter 48 is actuated byinserting a pinch bar or other suitable tool in one of the sockets 58 inthe split ring, and the split ring rotated in its annular groove 51 atleast one-half a revolution. By reason of the wire 4B being stretchedbetween studs 49, 50 which are disposed in the ring at diametricallyopposite points and the ring rotated, the wire will be caused to movetransversely across the outlets in the movable-member and thereby cutthe material passing outwardly therefrom.

In Figs. 4 and 5 the severing means 59 is actuated by the movement ofthe ring gear 62 in its annular recess 63 in the movable member 64,which movement of the ring gear is motivated from a source of power (notshown) applied to the shaft 16 having keyed thereon a spiral gear 11which transmits its motion to the spiral gear 1I loosely'mounted on thehinged pin 12 of the `knuckle 13, which gear 1I, in turn, moves thespiral gear 10 and the shaft 68 having the pinion 81 thereon, whichpinion 81 meshes with the ring gear 82.

'Ihe construction above described enables the members forming thestrainer head to be separated and replaced; such removal beingaccomplished in a ready and expeditious manner. The' readjustment vofthe parts in the exactly desired positions is readily assumed. Thedevice is of simple character, easily manufactured, and readily adaptedto a strainer or approved extruding machine.

It will be understood that various changes may be resorted to in theform, construction and arrangement of the several parts withoutdeparting from the spirit and scope of my invention, and hence I do notintend to be limited to the details herein shown and described, exceptas they may be included in the claims.

What I claim is: y

1. In combination with the cylinder and screw of an extruding machine, ahead comprising fixed and movable members hinged together, each memberhaving an opening therethrough for the passage of the material, saidopening ln the fixed member being abruptly flared immediately in advanceof the screw receiving portion of the member and the opening in themovable member slightly flared outwardly therefrom, said-,movable memberhaving diametrically opposed partitions in the ilared opening, arelatively thin strainer plate interposed between the members inposiltion to'be reinforced and -supported against lateral distortion bysaid partitions, and means movable on the iixed member and adapted toengage the movable member for locking the members togethei".

2. In combination with the cylinder and screw of an extruding machine, ahead comprising fixed and movable members hinged together, eachv memberhaving an opening therethrough for the passage of the material, said.opening in the fixed member being abruptly flared immediately in advanceof the screw receiving portion of the member and the opening in themovable member slightlyfilared outwardly therefrom, said movable memberhaving diametrically opposed partitions in the ared opening, arelatively thin strainer plate interposed between the members inposition to be reinforced and supported against lateral distortion bysaid partitions, said strainer plate being removably secured to themovable member, and means movable on the fixed member and adapted toengage the movable member for locking the members together.

3. In combination with the cylinder and screw of an extruding machine, ahead comprising Iixed and movable members hinged together, each memberhaving an opening therethrough for the passage of the material, saidopening in the xed member being abruptly flared immediately in advanceof the screw receiving portion of the member and having a shoulderformed therein adjacent the outer end of the abruptly flared opening,said opening in the movable member being slightly iiared, said movablemember having diametrically opposed partitions in the ared opening, arelatively thin strainer plate interposed between the members and seatedagainst said shoulder in position to be reinforced and supported againstlateral distortion by said partitions, and means movable on the xedmember and adapted to engage the movable member for locking the memberstogether, n

4. In combination with the cylinder and screw oi.' an extruding machine,a head comprising ilxed and movable members hinged together, each memberhaving an opening 'therethrough for the passage of the material, saidopening'l in the .iixed member being abruptly ared immediately inadvance of .the screw receiving portion of the member and having ashoulder formed therein adjacent the outer end of the abruptly ilaredopening, said opening` in the movable member being slightly narod, saidmovable member having diametrically opposed partitions in the daredopening, a relatively thin strainer plate interposed between the membersand seated against said shoulder in position to be reinforced andsupported against lateral distortion by said partitions, said strainerplate being removably s ecured to the movable member, and means movableon the xed member and adapted to engage' the movable member for lockingthe members together.

5. In an extruding machine, the combination with the cylinder and screw,of a head comprising a member iixed to the cylinder and a member hingedto swing toward and away from the fixed member, said fixed member havinga longitudinal bore for the end of the screw, a chamber adjacent the endof the screw, the walls'of satd chamber being abruptly flared outwardlyfrom the bore of the cylinder, said movable member having an opening forthe passage of the material therethrough, the interior diameter of saidopening being substantially equal to the outer diameter of the ilaredchamber and slightly flared outwardly, a strainer plate interposedbetween the members and adjacent the flared chamber, and means forlocking the members together.

6. In an extruding machine, the combination with the cylinder and screw,of a head comprising a member ilxed to the cylinder and a member hingedto swing toward and away from the xed member, said lxed member having alongitudinal bore for the end of the screwa chamber adjacent the end ofthe screw, the walls of said chamber being abruptly flared outwardlyfrom the bore of the cylinder, said movable member having an opening forthe passage of the material therethrough, the interior diameter of saidopening being substantially equal to the outer diameter of the ilaredchamber and slightly flared outwardly, a strainer plate removablysecured to the interior face of the movable member in position to spanthe flared chamber when the members are assembled, and means for lockingthe members together.

7. In an extruding machine, the combination with the cylinder and screw,of a head comprising a member fixed to the cylinder and a member 1hinged to vswing toward and away from the xed member, said fixed memberhaving a longitudinal bore for the end of the screw, a chamber adjacentthe end of the screw, the walls of said chamber being abruptly flaredoutwardly from the bore of the cylinder and terminating in an hinged toswing toward and away from the iixed member, said tlxed member having alongitudinal bore for the end of the screw, a chamber adjacent the endoi.' the screw, the walls oi' said chamber being abruptly ilaredoutwardly from the bore of the cylinder and terminating in an annularrecess, said movable member having an opening i'or the passage of thematerial therethrough, the interior diameter of said opening beingsubstantially equal to the outer diameter of the ilared chamber andslightly iiared outwardly, a strainer plate removably secured to theinterior i'ace oi' the movable member in position to seat in said recesswhen the members are assembled, and means for locking the memberstogether.

9. In an extruding machine, the combination with the cylinder and screw,of a head comprising a member fixed to the cylinder and a swinglngmember carried by the xed member, said xed member having a longitudinalbore for the end of the screw, a foraminous plate and straining screencarried by the head in spaced relation to the front end of the screw andin spaced relation to the front end of the swinging member so as to formchambers for the passage o! the extruded material on each side of theforaminous platejthe diameter o! said chambers being greater than thediameter of the screw bore, means for locking the xed and swingingmembers together, an annular support mountedat the front end of theswinging member, an elongated severing member of such smallcross-sectional dimension as to oier no substantial resistance to theextrusion of the material and to be adapted to cut the material bothlongitudinally and transversely, said severing member being free ofsupporting or reinforcing means intermediate its ends and being xedlysecured at both its ends to said annular support, and means for rotatingsaid annular support so as to twist said severing member about animaginary point substantially in line with the axis of extrusion i'orperiodically transversely cutting the extruded material upon adiametrical line.

VERNON ROYLE.

